Diction used by your character is very important and creates their personality and disposition. Word choice makes such big difference when writing your story and one wrong word can either throw your reader out of the story or cause them to mistrust the character.
One way to keep consistency is giving your character a specific English base-language. English is a compound language mixed with all sorts of other languages that we have adopted. When you know the base to words, whether they come from the Anglo-Saxons, Romans, or even the French, it’s easier to be consistent.
It’s important when writing your character’s dialogue to pay attention to the etymology of their diction.
Here is a very general list of characteristics associated with the English base-languages.
A brief overview:
- Latin: Posh, Intelligent, Thinker, Upper-Class
- French: Sophisticated, Upper-Class, Eloquent
- Anglo-Saxon: Straightforward, Lower Class